%0 Journal Article %1 ISI:000263732700038 %A Lovelock, K. R. J. %A Kolbeck, C. %A Cremer, T. %A Paape, N. %A Schulz, P. S. %A Wasserscheid, P. %A Maier, F. %A Steinrueck, H.-P. %D 2009 %J JOURNAL OF PHYSICAL CHEMISTRY B %K Surface %N 9 %P 2854-2864 %R 10.1021/jp810637d %T Influence of Different Substituents on the Surface Composition of Ionic Liquids Studied Using ARXPS %V 113 %X Angle resolved X-ray photoelectron spectroscopy has been used to study the surface composition of various nonfunctionalized and functionalized 1,3-dialkylimidazolium ionic liquids. For C(n)C(1)ImTf2N (where n = 2-16), an enrichment of the aliphatic carbon was observed for longer chains (n >= 4). Enrichment of the aliphatic carbon also occurs for alkyl chains attached to the anion, as observed for C2C1IMOcOSO(3). Oligo(ethyleneglycol)ether (PEG) functionalities in the cation lead to a surface composition close to bulk stoichiometry and thus a loss in enrichment of the chains. This effect is attributed to attractive interactions between the oxygen atoms on the cation to the hydrogen atoms on the imidazolium ring for Et(EG)(2)MImTf2N and Me(EG)(3)MImTf2N.

@article{ISI:000263732700038, abstract = {{Angle resolved X-ray photoelectron spectroscopy has been used to study the surface composition of various nonfunctionalized and functionalized 1,3-dialkylimidazolium ionic liquids. For {[}C(n)C(1)Im]{[}Tf2N] (where n = 2-16), an enrichment of the aliphatic carbon was observed for longer chains (n >= 4). Enrichment of the aliphatic carbon also occurs for alkyl chains attached to the anion, as observed for {[}C2C1IM]{[}OcOSO(3)]. Oligo(ethyleneglycol)ether (PEG) functionalities in the cation lead to a surface composition close to bulk stoichiometry and thus a loss in enrichment of the chains. This effect is attributed to attractive interactions between the oxygen atoms on the cation to the hydrogen atoms on the imidazolium ring for {[}Et(EG)(2)MIm]{[}Tf2N] and {[}Me(EG)(3)MIm]{[}Tf2N].}}, added-at = {2009-06-29T17:55:14.000+0200}, author = {Lovelock, K. R. J. and Kolbeck, C. and Cremer, T. and Paape, N. and Schulz, P. S. and Wasserscheid, P. and Maier, F. and Steinrueck, H.-P.}, biburl = {https://www.bibsonomy.org/bibtex/2557134c171afa04a95a47183de2729a1/psschulz}, doi = {{10.1021/jp810637d}}, interhash = {4d07454c4260979ae1643f2bb607ea01}, intrahash = {557134c171afa04a95a47183de2729a1}, issn = {{1520-6106}}, journal = {{JOURNAL OF PHYSICAL CHEMISTRY B}}, keywords = {Surface}, month = {{MAR 5}}, number = {{9}}, pages = {{2854-2864}}, timestamp = {2009-06-29T17:57:08.000+0200}, title = {{Influence of Different Substituents on the Surface Composition of Ionic Liquids Studied Using ARXPS}}, unique-id = {{ISI:000263732700038}}, volume = {{113}}, year = {{2009}} }